ECHO1 MK1 SR556 6" QUICK DETACH BARREL EXTENSION IN BLACK - OEM BY MADBULL AIRSOFT HPA System nunchuck style batteries can fit

nunchuck style batteries can fit in the tubes or a small lithium polymer brick battery can fit at the rear of the stock in front of the buttpad

-(Ballistic plate and soft armor are not included)

Muzzle Velocity: 350 FPS (w/

Extra Battery

ECHO1 MK1 SR556 6" QUICK DETACH BARREL EXTENSION IN BLACK - OEM BY MADBULL AIRSOFT HPA System nunchuck style batteries can fitMadBull has partnered with Echo1 to bring to you Echo1s MK1 SR 5. 56 Quick Detach Barrel Extension. The MK1 is a unique barrel extension because of its quick detach feature. This allows you to attach or remove the barrel extension in one simple step. The MK1 package comes with the barrel extension and flash hider specially designed for quick detach function. There are 3 lengths of barrel extensions. The 6 and 6. 75 comes with a standard flash hider